#include<stdio.h>
#include<string.h>
int is_leap_year(int y){
	if((y%4==0&&y%100!=0)||(y%400==0)){
      return 1;
	}else{
	return 0;
	}
      }

int main(){
	
	for(int year=1000;year<=2000;year++){
		if(1 == is_leap_year(year)){
           printf(" %d",year);
		}
	}
return 0;
}